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The genus Cladosporium and similar dematiaceous ... - CBS - KNAW

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Crous et al.<br />

have conidiomata ranging from acervuli to pycnidia (Cortinas et<br />

al. 2006). Phylogenetically this coelomycete morphology, with<br />

its characteristic conidiogenesis, has evolved several times in<br />

Teratosphaeriaceae.<br />

Readeriella blakelyi (Crous & Summerell) Crous & U. Braun,<br />

comb. nov. MycoBank MB504516.<br />

Basionym: Colletogloeopsis blakelyi Crous & Summerell, Fungal<br />

Diversity 23: 342. 2006.<br />

Readeriella brunneotingens Crous & Summerell, sp. nov.<br />

MycoBank MB504517. Fig. 19.<br />

Etymology: Named after the diffuse brown pigment visible in agar<br />

when cultivated on MEA.<br />

Readeriellae gauchensi similis, sed coloniis viridi-atris et pigmento brunneo in agaro<br />

diffundente distinguenda.<br />

Leaf spots amphigenous, irregular specks up to 3 mm diam,<br />

medium brown with a thin, raised, concolorous border. Conidiomata<br />

amphigenous, substomatal, exuding conidia in black masses;<br />

conidiomata pycnidial in vivo <strong>and</strong> in vitro, globose, brown to black,<br />

up to 120 µm diam; wall consisting of 3–4 cell layers of brown<br />

cells of textura angularis. Conidiogenous cells brown, verruculose,<br />

aseptate, doliiform to ampulliform, or reduced to inconspicuous loci<br />

on hyphae (in vitro), proliferating percurrently near the apex, 5–7 ×<br />

3–5 µm; sympodial proliferation also observed in culture. Conidia<br />

brown, smooth to finely verruculose, ellipsoidal to subcylindrical,<br />

apex obtuse to subobtuse, tapering to a subtruncate or truncate<br />

base (1–1.5 µm wide) with inconspicuous, minute marginal frill,<br />

(5–)6–7(–8) × 2–3(–3.5) µm in vitro, becoming 1-septate; in older<br />

cultures becoming swollen, <strong>and</strong> up to 2-septate, 15 µm long <strong>and</strong><br />

5 µm wide.<br />

Cultural characteristics: Colonies on MEA reaching 20 mm diam<br />

after 2 mo at 25 °C; colonies erumpent, aerial mycelium sparse to<br />

absent, margins smooth but irregularly lobate; surface irregularly<br />

folded, greenish black, with profuse sporulation, visible as oozing<br />

black conidial masses; a diffuse dark-brown pigment is also<br />

produced, resulting in inoculated MEA plates appearing darkbrown.<br />

Specimen examined: Australia, Queensl<strong>and</strong>, Cairns, Eureka Creek, 48 km from<br />

Mareeba, S 17° 11’ 13.2”, E 145° 02’ 27.4”, 468 m, on leaves of Eucalyptus<br />

tereticornis, 26 Aug. 2006, P.W. Crous, <strong>CBS</strong>-H 19838 holotype, culture ex-type<br />

CPC 13303 = <strong>CBS</strong> 120747.<br />

Notes: Conidial dimensions of R. brunneotingens closely<br />

match those of Readeriella gauchensis (M.-N. Cortinas, Crous<br />

& M.J. Wingf.) Crous (Cortinas et al. 2006). <strong>The</strong> two species<br />

can be distinguished in culture, however, in that colonies of R.<br />

brunneotingens are greenish black in colour, sporulate profusely,<br />

<strong>and</strong> exude a diffuse, brown pigment into the agar, whereas colonies<br />

of R. gauchensis are more greenish olivaceous, <strong>and</strong> exude a yellow<br />

pigment into the agar (Cortinas et al. 2006).<br />

Readeriella considenianae (Crous & Summerell) Crous & U.<br />

Braun, comb. nov. MycoBank MB504518.<br />

Basionym: Colletogloeopsis considenianae Crous & Summerell,<br />

Fungal Diversity 23: 343. 2006.<br />

≡ Phaeophleospora destructans (M.J. Wingf. & Crous) Crous, F.A. Ferreira<br />

& B. Sutton, S. African J. Bot. 63: 113. 1997.<br />

Readeriella dimorpha (Crous & Carnegie) Crous & U. Braun,<br />

comb. nov. MycoBank MB504520.<br />

Basionym: Colletogloeopsis dimorpha Crous & Carnegie, Fungal<br />

Diversity 23: 345. 2006.<br />

Readeriella gauchensis (M.-N. Cortinas, Crous & M.J. Wingf.)<br />

Crous & U. Braun, comb. nov. MycoBank MB504521.<br />

Basionym: Colletogloeopsis gauchensis M.-N. Cortinas, Crous &<br />

M.J. Wingf., Stud. Mycol. 55: 143. 2006.<br />

Readeriella pulcherrima (Gadgil & M. Dick) Crous & U. Braun,<br />

comb. nov. MycoBank MB504522.<br />

Basionym: Septoria pulcherrima Gadgil & M. Dick, New Zeal<strong>and</strong> J.<br />

Bot. 21: 49. 1983.<br />

≡ Stagonospora pulcherrima (Gadgil & M. Dick) H.J. Swart, Trans. Brit.<br />

Mycol. Soc. 90: 285. 1988.<br />

= Cercospora eucalypti Cooke & Massee, Grevillea 18: 7. 1889.<br />

≡ Kirramyces eucalypti (Cooke & Massee) J. Walker, B. Sutton & Pascoe,<br />

Mycol. Res. 96: 920. 1992.<br />

≡ Phaeophleospora eucalypti (Cooke & Massee) Crous, F.A. Ferreira & B.<br />

Sutton, S. African J. Bot. 63: 113. 1997.<br />

Notes: <strong>The</strong> epithet “eucalypti” is preoccupied by Readeriella<br />

eucalypti (Gonz. Frag.) Crous (Summerell et al., 2006), <strong>and</strong> thus<br />

the synonym “pulcherrima” becomes the next available name for<br />

this species.<br />

Readeriella readeriellophora, see Teratosphaeria readeriellophora.<br />

Fig. 18.<br />

Readeriella stellenboschiana (Crous) Crous & U. Braun, comb.<br />

nov. MycoBank MB504523.<br />

Basionym: Colletogloeopsis stellenboschiana Crous, Stud. Mycol.<br />

55: 110. 2006.<br />

Readeriella zuluensis (M.J. Wingf., Crous & T.A. Cout.) Crous &<br />

U. Braun, comb. nov. MycoBank MB504524.<br />

Basionym: Coniothyrium zuluense M.J. Wingf., Crous & T.A. Cout.,<br />

Mycopathologia 136: 142. 1997.<br />

≡ Colletogloeopsis zuluensis (M.J. Wingf., Crous & T.A. Cout.) M.-N.<br />

Cortinas, M.J. Wingf. & Crous (zuluense), Mycol. Res. 110: 235. 2006.<br />

Staninwardia B. Sutton, Trans. Br. Mycol. Soc. 57: 540. 1971.<br />

Type species: Staninwardia breviuscula B. Sutton, Trans. Br. Mycol.<br />

Soc. 57: 540. 1971.<br />

Description: Sutton (1971; fig. 1).<br />

Notes: <strong>The</strong> <strong>genus</strong> Staninwardia presently contains two species,<br />

namely S. breviuscula <strong>and</strong> Staninwardia suttonii Crous & Summerell<br />

(Summerell et al. 2006), though its placement in Capnodiales was<br />

less well resolved. <strong>The</strong> <strong>genus</strong> forms acervuli on brown leaf spots,<br />

with brown, catenulate conidia covered in a mucilaginous sheath.<br />

Readeriella destructans (M.J. Wingf. & Crous) Crous & U. Braun,<br />

comb. nov. MycoBank MB504519.<br />

Basionym: Kirramyces destructans M.J. Wingf. & Crous, S. African<br />

J. Bot. 62: 325. 1996.<br />

26

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